We have continuously balanced engineering demands with environmental considerations to ensure we offer the most economically viable solution, not just from a retaining structures perspective, but also considering safety and whole life project costs.

We are solutions not product led so work to provide the most appropriate solution to your retaining and slope stabilisation needs.

Phi Group designs and installs more than 300 retaining walls every year in a challenging and demanding field of construction using our wide range of bespoke solutions. We are extremely proud of our track record, from a quality, service and health and safety perspective.

Being part of the Keller Group of companies helps reinforce our position as the market leader, utilising the financial security, engineering skills and technical knowledge, that being part of the world’s largest geotechnical specialist contractor brings.

Keller’s philosophy of global strength and local focus, ensures we give our customers cost effective and innovative solutions of the highest quality.

In the UK Keller has various divisions:

Keller UK

Keller UK provides a wide range of geotechnical and foundation solutions. Various forms of piling and ground improvement techniques, soil nails, ground anchors, grouting and restricted access piling all form part of their portfolio. More about Keller.

GEO-Instruments

GEO-Instruments specialises in providing instrumentation and monitoring solutions for a wide range of geo structural applications. We focus on providing reliable data from professionally installed instrumentation and presenting it to our clients in a clear and effective and user friendly way. More about GEO-Instruments.

Colcrete Eurodrill

Colcrete Eurodrill are a first choice manufacturer of grouting mixers and equipment, drilling consumables such as drill rods and casing. Our equipment  can be found worldwide on installations such as oil platforms or tunnelling projects. More about Colcrete Eurodrill.

Our history

Operational for more than 30 years, Phi Group is the UK's leader in retaining structures.  
Operational for more than 30 years, Phi Group is the UK's leader in retaining structures.  
Operational for more than 30 years, Phi Group is the UK's leader in retaining structures.  
Operational for more than 30 years, Phi Group is the UK's leader in retaining structures.  
Learn more

Our team

Meet some of the people responsible for keeping us at the forefront of the industry year after year.
Meet some of the people responsible for keeping us at the forefront of the industry year after year.
Meet some of the people responsible for keeping us at the forefront of the industry year after year.
Meet some of the people responsible for keeping us at the forefront of the industry year after year.
Learn more

About Keller Group

Phi Group is one of the connected companies of Keller. With offices in more than 40 countries across six continents, Keller is the largest geotechnical specialist contractor in the world.